The Lions have blown out the cellar dwellers. Like annihilated them.
I don't, however, understand where all this "unbeatable" stuff comes from. They have a less than 7 margin of victory against anyone who isn't Dallas, Indy or Jacksonville. When I compare to historic benchmark teams that, when you watched, you really had the sense nobody could compete with them (96 Packers, 07 Patriots who funny enough didn't win, 98 Vikings who also didn't win LOL), they do not carry that level of dominance to me.
If you are asking me to pick my team right now to win the SB, I'd pick them. I think they are a very good and disciplined team that doesn't beat themselves for the most part. But I don't even view them the same way I viewed the Seahawks in '14 where I really did not think the Packers had any shot of going in to Seattle and winning.
Unpopular opinion but I thought the Packers actually slowed them down defensively better than most teams had. I would still consider GB an underdog, but I just thought that game was a burn the tape game where we just had way too many unforced errors to compete. Frankly the way GB played I'm surprised it wasn't of the 52-6 variety.
I'd give the Packers a puncher's chance in a playoff game, and I'd give Philly a better shot than that as well as any of the other formidable teams. I don't think Detroit is going to just cakewalk through the conference like it seems most people believe. At a minimum, I don't see them as even remotely unbeatable.